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铁路旧线改建时,由于增加股道、站场展长等原因经常引起部分地段线路改拨。在进行铁路拨线时,钢轨要受到道床横向、纵向阻力,螺栓、扣件的扣压力,人工拨道时撬棍施加钢轨上的外力以及钢轨内部的温度力。这些力对线路的伸长和缩短均有一定的影响;加上施工时拨移线路位置与理论中线的偏差等因素的影响,往往使预先配好的钢轨长度与现场实际长度不符,迫使在封锁点内应急处理,影响施工顺利进行。而且钢轨、钢筋混凝土轨枕的重量越来越大,人工拨道的难度也随之增大,需要进一步改进施工方法。为此我段在京广线电化工程改建中,通过30余处拨道的实践,对线路改拨中的技术方案选取、施工方法、安全措施和人员组织等问题提
When the old railway line was rebuilt, it often caused part of the lines to be redirected due to the increase of the stock channel and the growth of the station yard. In the railway line, the rail to be track bed horizontal and vertical resistance, bolts, fasteners buckle pressure, manually dial the crowbar to exert external force on the rail and rail temperature. These forces have a certain impact on the extension and shortening of the line. Coupled with the influence of factors such as the position of the dialing line and the deviation of the theoretical center line during construction, the length of the preset rail is often inconsistent with the actual length of the site, forcing the blockade Point emergency treatment, affecting the smooth construction. And rail, reinforced concrete sleepers heavier and heavier, the difficulty of manually dialing also increased, the need for further improvement of construction methods. For this reason, during the reconstruction of Beijing-Guangzhou line electrification project, I asked some questions such as the selection of technical solutions, construction methods, safety measures and personnel organization in more than 30 ways